Camfil Farr Air Pollution Control (APC) has introduced a pulse-cleaned industrial vacuum with dual-stage HEPA filtration that drastically minimizes clogs, preventing the problems that result from loss of suction during cleaning. Called the FarrVac Junior, it uses a patented pulse-cleaning technology that works without compressed air. Filters are cleaned every 10 seconds. Camfil Farr APC,, (800) 479-6801. products